SN Certified TechnicianMod Dude

1. Never exceed the posted speed limit (For my safety mostly)
2. The gauge in your dash is mechanical
3. I'm almost certian that the cluster from a 79-85 Mustang is the same and you could inter change them.
4. You can recalibrate and add a new face plate to your current speedo to get it to 140 mph.
5. Be safe our there

1. Never exceed the posted speed limit (For my safety mostly)
2. The gauge in your dash is mechanical
3. I'm almost certian that the cluster from a 79-85 Mustang is the same and you could inter change them.
4. You can recalibrate and add a new face plate to your current speedo to get it to 140 mph.
5. Be safe our there

1. Never exceed the posted speed limit (For my safety mostly)
2. The gauge in your dash is mechanical
3. I'm almost certian that the cluster from a 79-85 Mustang is the same and you could inter change them.
4. You can recalibrate and add a new face plate to your current speedo to get it to 140 mph.
5. Be safe our there

SN Certified TechnicianMod Dude

Not all of the gauges are mechanical. most of the others with the exception of the tach are electronic. The speedo will have to be sent out to be calibrated. I'll look to see if I have a contact for that anymore and try to get back to you.

Not all of the gauges are mechanical. most of the others with the exception of the tach are electronic. The speedo will have to be sent out to be calibrated. I'll look to see if I have a contact for that anymore and try to get back to you.

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Come to think of it, I think that your initial suggestion of doing the white face overlay is the way to go. I may want to replace the bulb in the dash too, it's kind of dim. I found a local shop that can calibrate speedo's up by me. Thanks for your help though!

I talked to a shop today that handles calibrating of speedometers and I told him I was going to wait until I could afford to swap a 8.8 in with gears so that everything could be done at once and he said that was a different thing just as you pointed out here. When gear swaps are done is when the speedo gear is an appropriate and necessary change from what I understand.

gear and tire size is what messes up the speedo. Both my mustang and my jeep run aftermarket wheels/tires and rear ends. When I am concerned about how fast I am actually going I use the GPS on my phone to give me a more accurate reading. Not saying its the be all end all of solutions but in town I am limited to the flow of traffic but on the highway i just pull up my speedo app.